LibWeb: Add simple implementation of Document.createElementNS

Author: https://github.com/Lubrsi
Commit: https://github.com/SerenityOS/serenity/commit/449c6c56040
Pull-request: https://github.com/SerenityOS/serenity/pull/5151

Userland/Libraries/LibWeb/CodeGenerators/WrapperGenerator.cpp

@@ -56,7 +56,7 @@ static String snake_name(const StringView& title_name)
 
 static String make_input_acceptable_cpp(const String& input)
 {
-    if (input.is_one_of("class", "template", "for", "default", "char")) {
+    if (input.is_one_of("class", "template", "for", "default", "char", "namespace")) {
         StringBuilder builder;
         builder.append(input);
         builder.append('_');
@@ -1031,7 +1031,7 @@ static @fully_qualified_name@* impl_from(JS::VM& vm, JS::GlobalObject& global_ob
 
     auto generate_to_cpp = [&](auto& parameter, auto& js_name, const auto& js_suffix, auto cpp_name, bool return_void = false, bool legacy_null_to_empty_string = false, bool optional = false) {
         auto scoped_generator = generator.fork();
-        scoped_generator.set("cpp_name", cpp_name);
+        scoped_generator.set("cpp_name", make_input_acceptable_cpp(cpp_name));
         scoped_generator.set("js_name", js_name);
         scoped_generator.set("js_suffix", js_suffix);
         scoped_generator.set("legacy_null_to_empty_string", legacy_null_to_empty_string ? "true" : "false");
@@ -1109,7 +1109,7 @@ static @fully_qualified_name@* impl_from(JS::VM& vm, JS::GlobalObject& global_ob
         Vector<String> parameter_names;
         size_t argument_index = 0;
         for (auto& parameter : parameters) {
-            parameter_names.append(snake_name(parameter.name));
+            parameter_names.append(make_input_acceptable_cpp(snake_name(parameter.name)));
             arguments_generator.set("argument.index", String::number(argument_index));
 
             arguments_generator.append(R"~~~(

Userland/Libraries/LibWeb/DOM/Document.cpp

@@ -566,12 +566,21 @@ JS::Value Document::run_javascript(const StringView& source)
     return result;
 }
 
+// https://dom.spec.whatwg.org/#dom-document-createelement
+// FIXME: This only implements step 6 of the algorithm and does not take in options.
 NonnullRefPtr<Element> Document::create_element(const String& tag_name)
 {
     // FIXME: Let namespace be the HTML namespace, if this is an HTML document or this’s content type is "application/xhtml+xml", and null otherwise.
     return DOM::create_element(*this, tag_name, Namespace::HTML);
 }
 
+// https://dom.spec.whatwg.org/#internal-createelementns-steps
+// FIXME: This only implements step 4 of the algorithm and does not take in options.
+NonnullRefPtr<Element> Document::create_element_ns(const String& namespace_, const String& qualified_name)
+{
+    return DOM::create_element(*this, qualified_name, namespace_);
+}
+
 NonnullRefPtr<DocumentFragment> Document::create_document_fragment()
 {
     return adopt(*new DocumentFragment(*this));

Userland/Libraries/LibWeb/DOM/Document.h

@@ -146,6 +146,7 @@ public:
     JS::Value run_javascript(const StringView&);
 
     NonnullRefPtr<Element> create_element(const String& tag_name);
+    NonnullRefPtr<Element> create_element_ns(const String& namespace_, const String& qualifed_name);
     NonnullRefPtr<DocumentFragment> create_document_fragment();
     NonnullRefPtr<Text> create_text_node(const String& data);
     NonnullRefPtr<Comment> create_comment(const String& data);

Userland/Libraries/LibWeb/DOM/Document.idl

@@ -19,6 +19,7 @@ interface Document : Node {
     ArrayFromVector querySelectorAll(DOMString selectors);
 
     Element createElement(DOMString tagName);
+    Element createElementNS(DOMString? namespace, DOMString qualifiedName);
     DocumentFragment createDocumentFragment();
     Text createTextNode(DOMString data);
     Comment createComment(DOMString data);